The development of gender roles is one of the most important areas of human development. The moment a woman discovers she is pregnant she is often anxious to find out the sex of her baby. The definitions of the terms "sex" and "gender" must be understood. The term "sex" denotes the actual physical composition of individuals which defines them as male or female. Sex is determined by genetic composition, internal reproductive organs, brain organization, and external genitalia. How individuals behave as male or female, the types of roles they take on, and their personality characteristics can be just as important as a person's biological makeup. To differentiate biological characteristics, behaviors and social roles can be taken into consideration to establish "gender". Sex and gender are often intertwined, and some social expectations can be attributed to one's biological sex. The sex of a newborn baby sets the agenda for a whole series of developmental experiences that will influence the person throughout their life. Overall, sex differences between boys and girls in the first year of life are minimal. Boys may be a little more active or more demanding and girls more physically mature and less prone to physical problems, but that may be the extent of the significant differences. Mothers have a tendency to ignore their sons' emotional outbursts more than their daughters'. Boys may be mistreated or even treated in a more aggressive manner. This is in line with the stereotype of boys as tougher or tougher and girls as gentle and soft. A parent can influence their child into these gender roles through how they discipline them. They might be harder on a guy than a girl for the exact same behavior. "Who...... half of the document ...... in the acquisition of gender difference in behavior and attitudes plays a role in gender socialization (Lau, 1996). Gender role socialization according to one cross-cultural study found that it could be narrowly defined by the type of sexual behaviors such as play activities and toys. In summary, gender identity is a learned behavior that begins at an early age and can hinder or enhance a child's development role in how a person defines themselves and grows as a person depending on their confidence in being male or female and what it means to them and what they are taught at a young age The bottom line is that men and women are different, and as a society and as parents whether they are male or female they do not meet, we must fit into a certain box, since people are unique in themselves, and this is what we can improve and cultivate to develop.